Impulse-controlling system



H. P. CLAUSEN. IMPULSE CONTROLLING SYSTEM.

APPLICATION FILED AUG-19,1918.

Patented Sept. 21,- 1920.

2 SHEETSSHEET' 1- m w n vma h WP mm w k W H. P. CLAUSEN-.

IMPULSE CONTROLLING SYSTEM.

APPLICATION FILED AUG. 19, 1918.

1,353,517, a PatentedSept.21,1920.

3: I r 2 SHIEETSSHEET 2.

unit

HENRY CLAUSEN, OF MOUNT VERNON NEW YORK, ASSIG'NOR T0 WESTERN ELEC- TRIO COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF YORK.

IMPULSE-CONTROLLING SYSTEM.

Specification of Letters Patent. Patented Sept, 21, 1920,

Application filed August 19, 1918. Serial No. 250,510.

T 0 all whom it may concern a citizen .of the UnitedStates, residing at Mount Vernon, in the county of l/Vestchester and State of New York, have invented certain new and usefullmprovements in Impulse-Controlling Systems, of which the following is a full, clear, concise, and exact description.

This invention is an improvement in impulse controlling systems and has particular referenceto means for controlling the recording and establishment of connections in telephone exchanges utilizing selectively op-. erable switching devices.

In the operation of telephone sub-exchanges, such as private branch exchanges attended by an operator, and where the main exchange'is arranged on a full automatic basis, it has been customary for the operator to make a temporary memorandum of the called number.v With a large number of trunk .circuits'between the private branch exchange and a main automatic exchange, means are necessary for permitting the operator to connect with an idle trunk circuit and dial for the desired line. Heretofore,

trunk circuit and then dialing the wanted number, it bein'gnecessary to repeat the 0p-,

. eration should the wanted line be busy.

It is proposed, in the present invention,

to make a permanent record of a'desired number which record is designed to control the sending of impulses as often as desired.

To this end, use is preferably made of a perforating mechanism designed to be placed upon a telephone switchboard to enable the operator to perforate a card with spaced groups of openings corresponding to the digits of the called number, said mechanism I being operated by an arrangement having characteristics of a calling device. In transmitting a call, the card is associated with a trunk circuit by mounting the same upon a rotatable element designed to be actuated by the operator and engaging said card is a contact spring, one end of which moves into and out of the perforations in the card so that the spring will be given necessary vibra tory movement to make and break a circuit and thus transmit impulses to the line corresponding to the digits of the desired number.

An object of the invention is to provide an improved perforating mechanism by which the operator is enabled to quickly perforate a card with groups of openings that correspond to the digits of the wanted number and thereby provide a permanent record which may be readily and repeatedly associated with the transmitting mechanism.

Another object is to avoid the necessity of repeating the desired number, by the use of the ordinary calling or dialing device, should the wanted line be busy, by providing a transmitting apparatus into which the permanent record may be inserted and 'quickly operated to send impulses to the line.

The inventive idea involved is capable of receiving a variety of expressions, one of which, for the'purpose of illustrating the invention, is shown in the accompanying drawings; but it is to be expressly understood that said drawings are employed only to'facilitate the description of the invention as a whole and not to define the limits there- 'of, reference being had to the appended claims for this purpose.

In the drawings :Figure 1 is a plan view' of the perforating mechanism showing the circuits for energizing the electromagnets thereof; Fig. 2 is a vertical sectional View through a portion of the'perfora'ting mechanism: including the supporting frame for .the electromagnets; Fig. 3 is a plan view of the transmitting mechanism; Fig. 4 is a side elevation thereof, partly in section, and illustrating'the means for sending the impulses to the line; Fig. 5 is 'a' plan view, partly in section, .of an.operators board and showing the perforating and transmitting mecha-' ni'sms applied thereto.

The invention is shown in the drawings upon the frame are a plurality of electrovertically alined opening 20 in the base of the frame 1. Terminals of the electromagnets are connected by wire 21 to the battery 22 and ground.

A mechanism in the nature of an ordinary dialing or calling device is connected to the electromagnets and preferably consists of a dial 23 rotatably mounted upon a shaft 24 having a gear 25 keyed or otherwise secured thereto and which is operatively connected to the gears 26 and 27. The latter gear meshes with the teeth of a large gear 28 mounted upon a pivot 29 and provided with diametrically disposed pins 30 upon which a card or other record sheet 31 is mounted previous to being perforated. The gear 28 is provided adjacent its periphery with a plurality of openings 32 which receive the 'freeend of the punch or perforating pin 19 when the armature 16 is pulled up so that a perforation will be formed in the card 31. In order that rotary movement will only be transmitted to the gear 28 when the dial 23 is rotated in the direction of the arrow in Fig. 1, the gear 25 is engaged by spring pressed pawl 33 which locks the train of gears against the reverse movement when the dial 23 is automatically returned to its normal position by a mechanism commonly employed with dialing devices and therefore not shown in the present construction.

Arranged about the dial 23 are a plurality of groups of contacts Gto 15, connected by wire 34, one end of which termi nates in the contact normally spaced from the pivoted contact 36 which is connected to ground. Each of the electromagnets 6 to 15 inclusive is connected to each of the groups of contacts 6 to 15' inclusive by the wires 6" to 15. respectively. so that as the contacts of each group are successively engaged it. will be apparent that the respective electromagnet will be energized and its armature pulled up.

The dialing device is provided with a pivoted finger stop 37 having the projections 38 and 39 extending from the pivoted end thereof, the former projection being employed for the purpose of limiting the pivotal movement of the stop by engagement with the pins 40 while the projection 39 has connected thereto a spring 41 which yieldably maintains the finger stop in the normal position shown in Fig. 1. After the finger stop has been operated, as will appear, the same is returned to its normal position both by the action of the spring 41 and a pin 42 carried by the dial which contacts finger stop 37 upon the termination of the return movement of the dial. A wiper 43 is secured to the dial 23 and is so constructed that when the dial is rotated by the operator in a clockwise direction, said wiper will pass freely over the groups of contacts 6 to 15 but upon its return movement the same will on gage the outer contact of each group and momentarily force it into engagement with the inner contact, thus closing the circuit between the wire 34 and the respective wires 6" to 15". By rotating the dial as stated, the operators finger will come in contact with the stop 37 and rock the same about its pivot, throwing the projection 38 into engagement with the free end of the contact 36, which will, in turn, engage the contact 35 and connect ground to the wire 34, and upon the release of the dial by the operator the same will reverse its rotation and the wiper 43 will successively close the different groups of contacts in the path thereof, whereby the necessary impulses will be sent over the respective wires 6 to 15 to energize the electromagnets to which they are connected. It will be obvious that when the operator initially rotates the dial 23, there will be considerable movement thereof, depending upon which of the openings in the dial is engaged, before the finger contacts the stop 37, and this movement being imparted to the gear 28 the card 31 will be rotated sufliciently to space each group of perforations made therein from the next succeeding group.

In practice, should the operator'receive a call for a wanted number, for instance 138, the card 31 is first placed upon the gear 28 and the opening 1 of the dial engaged by a finger whereby the dial may be rotated in a clockwise direction until the' finger engages the stop 37 and rocks the same about its pivot until the projection 38 engages one of the stops 40, whereupon the spring 41 will be thrown off center to exert a pull upon the projection 39 and maintain the stop 37 in its operated position until it is returned to normal by engagement of the pin 42 with said stop when the dial is returned to normal. During this initial movement of the dial, the wiper 43 will have passed the group of contacts 6' without closing the same'and the projection 38 will have engaged the con-\ tact 36 to close the circuit from ground into the wire 34. Upon the release of the dial, the same is returned to itsnormal position by the mechanism previously referred to but not shown, and the wiper 43 will momentarily engage the outer contact of the group 6 and close a circuit from ground, contacts 36 and 35, wire 34, contact 6, wire prises a supporting 6", magnet 6, wire 21, battery 22 to ground, thus energizing the electromag'net 6 and pulling up its armature 16 to operate the perforator 19 thereof. Upon the return of the dial 23 to normal position, the finger stop 37 is rocked by the pin 42 and the engagement between contacts 35 and 36 broken.

The operator then engages the opening numbered 3 and rotates the dial until the finger stop 37 is again engaged, thus moving the wiper 43 past the three groups of contacts 6, 7 and 8, and during this rotation of the dial the gear 28 will be rotated to space the first perforation in the card from the next group to be made therein. Release of the dial will cause the wiper 43 to successively close the contacts 8, 7 and 6', thus energizing the respective'magnets to form three perforations in the card. At the end of this operation the dial is again rotated by engaging the finger in the opening numbered 8 and moving the wiper 43 past all of the groups of contacts up to and including the contacts 13' so that upon the return of the dial, eight electromagnets will be energized.

and a corresponding number of openings formed in card 31, whereupon the card may be removed from the pins 30 and thus provide a permanent record by which the operator may call the Wanted line. 7

It now becomes necessary to associate the card 31 with a trunk circuit whereby the impulses may be sent thereover to operate selectively operable switching devices in the usual manner. The transmitting mechanism employed in the present invention prefer-' ably comprises a casing 44 which has inclosed therein a spring motor (not shown) form of a disk or turn-table upon which is placed'the card 31 when it is desired to call the wanted subscriber, In Fig. 5 there is shown an operators board 48 having fourtransmitting devices mounted thereon, although it will be understood of course, that any number of these devices may'be employed according to the number of trunk circuits connected to the private branch exchange.

The transmitting mechanism further commember 49 having one end pivoted at 50, whereby, itsother end may be adjusted toward and away from the card 31 on the disk 47 and-the latter end of said supporting member is provided with a roller 52 designed to engage the card 31 when same is being rotated. Preferably between the disk 47 and the member '49, the

latter supports a contact spring 51 insulated therefrom and having one end in engagement with the card 31 and disposed in the path of movement of the perforations therein so that as the card is rotated, the free end of the spring 51 will move into and out of said perforations and thus have a vibratory movement imparted thereto.

Also supported by the member 49 and insulated therefrom and fromv the contact spring 51 is a contact member 53 which is normally spaced from spring 51. A. wire 54 is connected to the contact 53 and extended to a contact spring 55 preferably securedto the casing 44 and which normally engages contact 56 of a wire 57 leading to ground. This spring 55 is held in engage-v ment with the contact 56 through the medium of an insulated point 58 formed upon the free end of an arm 59 secured to the shaft of the winding key 46. However, when the key is given a slight rotation in order to energize the spring motor, the arm '59 is moved away from the spring 55, which then pulls up and breaks the contact at 56 until the key 46 returns to its normal position, which. occurs immediately upon the release thereof by the operator and before the disk 47 is moved appreciably. Thisaction of breaking the circuit through the Wire 54 at contact 56 is designed for the purpose of preventing impulses being sent to the trunk circuitth-rough the contact 53 When thedisk 47 is initially rotated by the winding of the motor mechanism, which rotation of the diskoccurs in a reverse direction from that necessary to send the impulses over the line in their proper order. As soon as the spring motor has been sufficiently Wound to impart approximately a complete revolution to the disk 47, the key 46 and consequently the arm 59, will, as

previously described, immediately return to' normal position and again engage the spring 55 with the contact 56, whereupon. the circuit will be closed at this point and the parts will be in position for operation. The vibration of the spring 51 will cause the same to engage and disengage the con-' tact 53, thus making and breaking the circuit at this point and sending impulses through the wire 60 connected to the spring 51' when the same engages contact 53.' An

impulse relay 61 is connected to the wire 60 and when energized will pull up its armature 62 and open the circuit through the wire 63 to the vswitch 64, the latter being normally connected to the armature 62 by the wire 65 at contact 66. The switch 64 is in circuit with the wires 67 of the trunk and said member 49 is returned so as to engage the roller 52 with the card and thus maintain the contact spring 51 in proper position to be vibrated by its passage into and out of the perforations in the card. The

switch 64 is then closed and the key 46 operated to energize the spring motor, at which time the circuit will be broken at contact 56 and the trunk circuit remain unaffected by any vibrations of the spring 51 due to its engagement in any of the perforations in the card. Before the card 31 begins to rotate in the reverse direction after being turned by the winding of the motor, the circuit through the wire 54 will again be closed at 55 and 56. As the free end of the spring 51 passes into and out of perforations in the card 31, contact 53 will be engaged and disengaged by said spring, thus successively energizing and denergizing the impulse relay 61 and transmitting the necessary impulses through the switch 64 to the trunk.

What is claimed is:

1. An impulse transmitting mechanism including a rotatable perforated record, a contact element movable into. and out of the perforations in said record, a second contact element interposed between said record and the first named contact element, and an impulse circuit controlled by said contact elements when the first named element moves into and out of the perforations in said record.

2. An impulse transmitting mechanism including a perforated record, means for rotating said record in either direction, a contact element movable intoand out of the perforations in said record, and an impulse circuit open when said record is rotated in one direction andcontrolled by the movements of said contact element when the record is rotated in an' opposite direction.

3. In a transmitting mechanism for automatic telephone systems, the combination with automatic switching apparatus includ ing a trunk circuit; of a perforated record sheet, means to rotate the same ineither direction, a contact spring engageable with said record sheet and movable into and out.

of the perforations therein whereby said spring is vibrated. and means operated by the vibrations of said spring for transmitting impulses to said trunk circuit when said record sheet is rotated in one direction only. c

4. In a transmitting mechanism for automatic telephone systems, the combination with automatic switching apparatus including a trunk circuit; of a perforated record impulses to said trunk circuit when said rotary element is moved in one direction, and means breaking the second named circuit when said rotary element is moved in the opposite direction.' I

5. In a transmitting mechanism for automatic telephone systems, the combination with automatic switching apparatus including a trunk circuit; of a perforated record sheet, a rotary element upon which said record sheet is adapted to be mounted, a spring motor rotating said means in both directions, said motor being wound in one direction to render the same active, a con tact spring movable into and out of the perforations in said record sheet whereby said spring is vibrated, a circuit to which said vibrations are transmitted whereby to send impulses to said trunk circuit, and means breaking the second named circuit when said motor is wound, whereby to prevent impulses being sent to said trunk circuit.

6. In a transmitting mechanism for automatic telephone systems, the combination with automatic switching apparatus including a trunk circuit; of a perforated record sheet, a rotary element upon which said record sheet is adapted to be mounted, a spring motor rotating said means in both directions, said motor being wound in one direction to render the same active, a contact spring movable into and out of the perforations in said record sheet whereby said spring is vibrated, a circuit to which said vibrations are transmitted whereby to send impulses to said trunk circuit, and means associated with the winding mechanism of said spring motor for breaking the second named circuit when said motor is wound to prevent the impulses being sent to said trunk circuit;

7. In a transmitting mechanism for automatic telephone systems, the combination with automatic switching apparatus including a trunk circuit; of a perforated record sheet, a rotary element upon which said record sheet is adapted to be mounted, a spring motor rotating said means in both directions, said motor being wound in one direction to render the same active, a contact spring movable into and out of the perforations in said record sheet whereby said spring is vibrated, a circuit to which said vibrations are transmitted whereby to send impulses to said trunk circuit, an impulse relay in the last named circuit energized and denergized by the vibrations in said spring, and means breaking the said last named circuit when said motor is Wound to prevent the impulses being sent to said trunk circuit.

8. In a transmitting mechanism for automatic telephone systems, the combination with automatic switching apparatus includsheet, rotatable means supporting the same, driving means actuating said rotatable means, a spring movable into'and out of the perforations in said record sheet whereby the spring is vibrated, a circuit to which said vibrations are transmitted whereby impulses are sent to said trunk circuit, and an impulse relay interposed in the second named circuit between said spring and said trunk circuit.

ing a trunk circuit; of a perforated record 15 In Witness whereof, I hereunto subscribe 25 my name this 1918.

12th dayof August, A.

HENRY P. OLAUSEN. 

